Re: Re: Output display of exponential function in Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg62700] Re: [mg62686] Re: Output display of exponential function in Mathematica*From*: carlsonkw at comcast.net*Date*: Thu, 1 Dec 2005 00:46:05 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Log[1/E^.5] -0.5 Log[1/E^-.5] ? .5 True Refine[1/E^x, 0<x<1] E^-x Or if you need to, Refine[Log[1/E^x], 0<x<1] -x Kris -------------- Original message -------------- > On Sun, 27 Nov 2005 08:24:53 +0000 (UTC), Bob Hanlon > wrote: > > >The output that you want is "unstable", i.e., Mathematica automatically > >converts it. > > > > Thanks. > > I have another question if you don't mind. > > I'm trying to just check and see if I got a whole bunch of > even-numbered study exercises right on exponents and natural logs. > The answers to the odds are in the book. > > As an example, LN(1/e^2) equals what? > > My answer is -1/2. > > In mathematica, I tried Simplify[LN(1/e^2)] and it just spit the same > thing out as the output. I also tried a couple of variations of > Solve[LN[1/e^2] = X] with essentially the same result > > How would you get Mathematica to verify that the answer is -1/2. > > Thanks a lot.